3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php namespace Foo; const true = false; if (true) { echo "TRUE"; } else { echo "FALSE!!!"; }
Output for 5.3.0 - 7.0.9
Fatal error: Cannot redeclare constant 'true' in /in/Wp4hi on line 3
Process exited with code 255.